Just returned and I agree: I don't think a deep dive is going to do much good right now. Until Fastpass returns, and hours/crowds/procedures/entertainment get closer to normal...you can only do so much planning. You just go and manage wait times as able throughout the day. My suggestions:
1) Setup your MDX account and download the App to start building "My Plans". It's much more advanced/integrated than DLR's app/system which is good and bad.
2) Reserve your park days as soon as possible. Magic Kingdom and Hollywood Studios may fill up, depending on your dates. IF they happen to be full, keep checking back as it's always in flux.
3) Start working on dining reservations (ADR). They are in constant flux as people cancel/move constantly, so you want to be looking throughout the day and may find yourself changing several times. Otherwise a good option is to just mobile order and eat outside. It's more flexible, less expensive, and keeps you from dining inside right now.
4) Parkhopping returns after the New Year. Can't help you there, just research the latest. Parkhopping is way more involved than DLR (bus/boat/skyliner/Uber) and I'm not convinced it's worth it unless there is nighttime entertainment to be seen in another park.
5) Be ready for ROTR boarding group system. The differences are: you can try at 7:00 AM for a Boarding group from anywhere (hotel room), but only if you have admission and a Park Pass for that day. They are gone in seconds, as usual. If you miss at 7:00 AM, you can try again at 1:00 PM, but only if you have scanned into Hollywood Studios before that point. Speed test Wifi and Data before 7:00 AM to see which one is faster. We used Data every time. *Anything that says 2:00 PM for the 2nd group is now out of date. 1:00 PM is the new time as/of last week.
6) The Skyliner is pretty cool and offers a great link between resorts, Epcot, and DHS. It's worth researching the line and where it goes. In the morning, it's been an advantage to ride it into DHS (ahead of the parking lots opening).
7) If using Uber/Lyft, google for some of the pitfalls, especially when going to Magic Kingdom.
8) I found this article and touring plans to be helpful and pretty reliable for the current environment at each park. However if one ride is down for a period of time, it can affect everything else. The rules of DLR apply right now: Get there early (*gates open and some rides start 30-45 mins before park opening to space out the morning crowds) and hit the headliners right away. Take a midday break if wanted/able, and ride hard just before closing. There are also some recent Youtube videos that are helpful. Check out recent vids from DFB Guide and Adam the Woo, among others.
*I agree with some others that ride times are often lower than published, by as much as 50% (usually 30% or so). They just can't measure them since the lines are so spaced out.
*All counter service, even the Blue/Green milk stand and Dole Whips are mobile payment. Stand off to the side and place your order. Usually you are called right away to collect your order. It actually works really well and we liked it versus waiting in line and ordering. Only at peak times at the busiest places will you see return windows push out past 30 minutes. The snack carts are the only exception where you can stand in line and order/pay.
*We read that Magic Bands are no longer free after 12/31/20. If that is a concern, you may want to order some online ahead of time and link to MDX (lots more design options online than at the front desk). I assume you can get by with the App (which can even unlock your Resort room door) but bands do make life a little easier around the Parks/resorts.
https://wdwprepschool.com/reopening/touring/
*Edits:
Change "rope drop" to "gates open"
Add info about mobile payment
Add Magic Bands